Vaporizer for internal-combustion engines.



D. ROBERTS.

VAPORIZER FOR INTERNAL GOMBUSTION ENGINES.

APPLICATION FILED AUG. 21, 1913.

Patented Jan. 5, 1915.

2 SHEETS-SHEET 1.

D. ROBERTS.

VAPORIZERPOR INTERNAL COMBUSTION ENGINES.

' APPLICATION FILED AUGfZl, 191 3.

1, 124,06 1 Patented Jan. 5, 1915.

2 SHEETSSHEET 2.

my. 5. my

DAVID ROBERTS, OF GRANTHAM, ENGLAND.

VAPORIZER FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented can. a, rats.

, Application filed August 21, 1913. Serial No. 785,953.

To all whom it may concern:

Be it known that 1', Davin ROBERTS, a subject of the King of Great Britain, residing at Spittlegate lron \Vorks, Grantham, Lincolnshire, England, have invented new and useful Improvements in Vaporizers for Internal-Combustion Engines, of which the following is a specification. My invention has reference to Vaporizers or combustion chambers for hydrocarbon engines of the type wherein a neck or contracted passage connects the vaporizer to the cylinder.

The object of my invention is to improve the efficiency of engines of this class by effecting a better mixing of the hydro-carbon fuel and air contained in the vaporizer and cylinder, and at the same time a richer mixture in the part of the vaporizer adjacent to the neck or contracted passage, so as to insure ignition and also by the more efficient disposition and the better shape of the Water cooling surfaces of the vaporizer. For this purpose I proceed as follows, that is to say,

I form the contracted passage or neck in the rear end of the cylinder and either centrally along or inclined to the longitudinal axis thereof, the said rear end of the cylinder being Water jacketed and formed with a fiat face to which is secured in any convenient manner the hot part of the vaporizer which is of hemispherical or other suitable shape. The longitudinal axis of the said vaporizer hotpart is arranged out of alinemen't relatively to the longitudinal axis of the neck or contracted passage, in such a manner that one Wall thereof is flush or approximately flush with the corresponding side of the said neck or contracted passage. The passage or inlet through which the hydro-carbon fuel is injected is located in the wall'of the hot part of the vaporizer and in any suitable position relatively to the flush Wall thereof. F or 'example, it may be placed in the Wall opposite the said flush Wall or at right angles thereto. Furthermore, in the outer Wall of the rear end of the cylinder between the neck or contracted passage therein, and th inner Wall of the hot part of the vaporizer" farthest aWay from the aforesaid neck or contracted passage there is provided, either as a loose part or as an integral part, a crescent or other suitably shaped depression or flat surface the size or area of which is designed to provide the necessary surface and of the vaporizer relatively to the contracted passage or neck in the cylinder, the relative pos t on of the fuel injection and the disposition and shape of the cool or Waterjacketed surfaces.

To enable the invention to'be fully understood l Wlll. describe it by reference to the accompanying drawings, in which l igure 1 is an endview of one form of vaporizer constructed according to the invention. Fig.2 is a horizontal section there- 01..

Fig. 3 is an end view illustrating a modified form of the vaporizer. Fig. 4 is a vertical section thereof. Figs. 5 and 6 are \'1\\'S similar to Figs. 1 and 2 respectively illustrating a furtli'er modification, and Figs. 7 and 8 are views similar to Figs. 3 and 4 respectively of still another modification.

a represents the cylinder Which is pro vided with the Water-jacket b at its rear part and c is the contracted neck or passage formed in the rear end of the cylinder which is made with the flat face a. i

(Z is the hot part of the vaporizer Which is applied against, and secured to, the Hat face a upon the water-jacketed end of the cylinder.

e is the passage or inlet through which the hydro-carbon fuel is injected into the hotpart (Z of the vaporizer;

Inthe construction illustrated in Figs. 1 and 2 the contracted neck or passage 0 is arranged centrally along the longitudinal axis of the cylinder a and the hot 'or unjacketed part d of the vaporizer is of approximately hemispherical shape and, as above described, its longitudinal axis is arranged out of alinement relatively to the longitudinal axis of the neck or contracted passage 0 so that itsrear wall is flush with the corresponding Wall or side of the said neck or passage 0 as is'clearly to be seen from the drawing. The passage or inlet e for the hydro-carbon fuel is in thisarrangement located at the side of the hot part d of the vaporizer opposite that Which is flush with the contracted passage or neck a so that the oil is injected horizontally into the said hot part at of the vaporizer and'on to the'side thereof which is flush with the wall or side of the passage 0.

The form of vaporizer illustrated in Figs. 3 and 4 is similarto that described in Figs. 1 and 2, that is to say, the contracted passage or neck isaxially arranged with respect to the cylinder at and the hot part (1 of the vaporizer is a ranged out of alinement rela-' tively to the contracted neck or -passage'c; the relative position of these two parts differing, however, in that the displacement of the vaporizer takes place fromabove downward instead of laterally so that it is now i trated in Figs. 1 and 2 with the exceptionthat the contracted neck or passage 0 in this case has its axis inclined to the longitudinal axis of the cylinder (1.

Figs. 7 and 8 show a construction which is similar to that illustrated in Figs. 3 and 4 except that in the form here shown the contracted neck or passage 0 has its axis in-, cline'd to that of the cylinder a.

f is the crescent or like shaped depression which is provided in the o uter wall a of the rear end of the dylinder between the vneck or contracted passage 0 and the inner wall of the hot part d of the vaporizer most remote from the said neck a. This depression, which may also be in the form of a flat surface, is of a size or area designed, as

' above'stated, to provide the requisite surface and capacity to the cool or water-jacketed part of the vaporizer. It is shown in each of the four'modifications illustrated.

As above described Vaporizers made in the manner hereinbefore set forth possess a number of advantages in practice. For example, they permit of a better mixture of fuel and air to lie-obtained than has hither- -'to been possible and at the same time a higher degreeof cooling and as a result of these features a higher etriciency. It will'be understoodthat such increased efiicienc results'from the special arrangement 0 the hot part of the vaporizer relatively to the neck or contracted passage and a so to the position of the fuel injection relatively to these two parts and tothe shape and disposition of the neck and water-jacketed surface.

. 1. A vaporizer or combustion chamber for internal combustion ,engines,comprising a' neck-formed in the cylinder end and provided with a water jacket, a hot part providedupon the end of the cylinder and hav- 1 neck formed in the cylinder end and provided with a water jacket, a hot part provided upon the end of .the cylinder and having its axis out of alinement with the axis 'of the neck, the hot part being so located that one side of the inner wall thereof lies flush with the corresponding side of the said neck and the-opposite wall of said hot part lies beyond the opposite side of said neck, a cooling surface provided on the end of said cylinder between the neck and the wall of the hot part which extends beyond said neck and means for directing the injected fuel against that portion of the hot part lying flush with the neck.

DAVID ROBERTS.

Witnesses WALKER HAvNEs, SAMUEL WILLIAM P YNE.

copies of thin patent may be obtained for five cents each, by. addressing the Commissioner of Patents.

' Welshlngton, D. c3 

